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- W4313592393 abstract "We consider an immersed elastic body that is actively driven through a structured fluid by a motor or an external force. The behavior of such a system generally cannot be solved analytically, necessitating the use of numerical methods. However, current numerical methods omit important details of the microscopic structure and dynamics of the fluid, which can modulate the magnitudes and directions of viscoelastic restoring forces. To address this issue, we develop a simulation platform for modeling viscoelastic media with tensorial elasticity. We build on the lattice Boltzmann algorithm and incorporate viscoelastic forces, elastic immersed objects, a microscopic orientation field, and coupling between viscoelasticity and the orientation field. We demonstrate our method by characterizing how the viscoelastic restoring force on a driven immersed object depends on various key parameters as well as the tensorial character of the elastic response. We find that the restoring force depends non-monotonically on the rate of diffusion of the stress and the size of the object. We further show how the restoring force depends on the relative orientation of the microscopic structure and the pulling direction. These results imply that accounting for previously neglected physical features, such as stress diffusion and the microscopic orientation field, can improve the realism of viscoelastic simulations. We discuss possible applications and extensions to the method." @default.
- W4313592393 created "2023-01-06" @default.
- W4313592393 creator A5010202678 @default.
- W4313592393 creator A5047155781 @default.
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- W4313592393 date "2023-02-02" @default.
- W4313592393 modified "2023-10-17" @default.
- W4313592393 title "Simulating structured fluids with tensorial viscoelasticity" @default.
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- W4313592393 doi "https://doi.org/10.1063/5.0123470" @default.
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